Sectional steam-boiler



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GQB. TREGURTHA. SEGTIONAL STEAM BOILER.

No. 425,013. Patented Apr.8, 1890.

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. SEOTIONAL STEAM BOILER. No. 425,013. Patented Apr. 8, 1 890.

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Wihacsss: Inventor.- maul mail I B Treguruz UNITED STATES GEORGE E. TREGURTHA, OF MALDEN, MASSACHUSETTS.

SECTIONAL STEAM-BOILER.

. SPECIFICATION forming part of Letters Original application filed November 23, 1888, Serial N0.291,6'76.

Patent No. 425,013, dated April 8, 1890.

Divided and this application filed November 4, 1889. Serial No- (No model.)

To all whom it may concern.-

Be it known that I, GEORGE E. TREGURTHA, of Malden, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Sectional Steam- Boilers, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to sectional steamboilers; and it consists in certain novel features of construction, arrangement, and combination of parts, which will be readily understood by reference to the description of the drawings and to the claims to be hereinafter given, and in which my invention is clearly pointed out.

Figure 1 of the drawings is a side elevation of the various sections of the boiler with the shell or outer casing cut in section on line a w 011 Fig. 2. Fig. 2 is a vertical transverse section of the outer casing on line y 3 on Fig. 1, and showing the sections, the steam and sediment drums, and the pipes connecting the several parts in elevation; and Fig. 3 is a horizontal section through two opposite upright drums on line 2 2 on Fig. 2, and showing their inwardly-projecting pipes in'plan.

In the drawings,A is the shell of the boiler.

13 is the smokedlue.

O C are the sediment-collecting drums or tubes.

D is the steain drum.

E is the steam-discharge pipe.

F is a pipe connecting the stea1n-drum with the sediment-collectors O O. The sedimentdrums O O are provided at each end with removable caps C O, by removing which access may be had to the interior of said drums for removing the sediment collected therein.

G is the grate, extending the whole length of the boiler from front to rear, and upon each side thereof is arranged a series of vertical drums or tubes 11 H, connected at their lower ends by a smaller tube or pipe a to the sediment-drums O C, as shown.

So far the boiler is identical with the de vices shown and described in another application of mine, filed November 23, 1888, No. 291,676, and of which this is a division.

The upper ends of the drums or tubes H H are each connected by the pipes Z) and c and the quarter-bend (1 direct to the steam-drum D, as shown in Figs. 1 and 2. Each of the drums or tubes H H has set in its inner side a series of U-shaped pipes e, in such a manner that both ends of each of the pipes of the series communicate with the interior of said drum H, and all of the pipes in a series being in the same vertical plane, and each shorter pipe being within the fold or bend of a longer pipe, and the longer U-shaped pipe in each case extending nearly to the opposite vertical drum H, as shown in Figs. 2 and 3.

Each section of the generator is composed of a vertical drum II and a series of bent tubes of different lengths, each having a U shape and communicating at each end with the interior of said vertical drum, each series of said bent tubes extending nearly across the grate or nearly to the opposite vertical drum and overlapping the corresponding series of bent pipes extending from the opposite Vertical drum H, as shown in Figs. 1 and 2. By this construction and arrangement of the vertical drums and the bent tubes 6 a very large and effective heating-surface is obtained, and provision is made whereby excessive expansion and contract-ion of the parts will not injure the joints or cause leakage thereof.

WVhat I claim as new, and desire to secure by Letters Patent of the United States, is

1. In a sectional steam-boiler, the combination of two vertical drums, one upon each side of the fire-box or grate, two series of U shaped pipes, the pipes in one series communicating at both ends with one of said vertical drums and the pipes of the other series communieating at both ends with the other of said vertical drums, both series projecting inward over and nearly to the other side of the grate, so that the pipes in one series shall overlap the pipes in the other series, a horizontal cylindrical steam-drum located over the center of the fire-box and extending from the front to the rear of the same, and smaller and more flexible horizontal pipes connecting said steam-drum. directly with the upper end of each of said vertical drums, whereby said vertical drums may expand longitudinally withp out injury to the connections.

2. In a sectional steam-boiler, the combination of a crate, two sediment-collecting drums arranged one upon each side of the grate and parallel to each OtllQ1,L steam-drum arranged directly over the center of the fire-box and parallel with said sedi1nentdmn1s, two series of vertical drums arranged one series above each of said sediment-drums, pipes connecting the lower ends of allof said vertical drums to said sediment-drums, a series of U-shaped' pipes or tubes communicating at both ends with the interior-0f each of said vertical drums and extending inward over and nearly to the opposite side of the grate, and small or comparatively-flexible pipes connecting the upper 

